US arrows visible from sky

The U.S. landscape is filled with myriad objects that are easily visible from the sky, and, while the purpose or source of many is widely known, others are tougher to explain. Take, for example, the giant concrete arrows that dot a number of the nation’s otherwise undeveloped expanses.

The U.S. landscape is filled with myriad objects that are easily visible from the sky, and, while the purpose or source of many is widely known, others are tougher to explain. Take, for example, the giant concrete arrows that dot a number of the nation’s otherwise undeveloped expanses.